/*
 * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
 *
 *
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 *
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 */
package javax.swing.text.html;

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.text.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import java.util.*;

/**
 * CommentView subclasses HiddenTagView to contain a JTextArea showing
 * a comment. When the textarea is edited the comment is
 * reset. As this inherits from EditableView if the JTextComponent is
 * not editable, the textarea will not be visible.
 *
 * @author Scott Violet
 */
class CommentView extends HiddenTagView {

  CommentView(Element e) {
    super(e);
  }

  protected Component createComponent() {
    Container host = getContainer();
    if (host != null && !((JTextComponent) host).isEditable()) {
      return null;
    }
    JTextArea ta = new JTextArea(getRepresentedText());
    Document doc = getDocument();
    Font font;
    if (doc instanceof StyledDocument) {
      font = ((StyledDocument) doc).getFont(getAttributes());
      ta.setFont(font);
    } else {
      font = ta.getFont();
    }
    updateYAlign(font);
    ta.setBorder(CBorder);
    ta.getDocument().addDocumentListener(this);
    ta.setFocusable(isVisible());
    return ta;
  }

  void resetBorder() {
  }

  /**
   * This is subclassed to put the text on the Comment attribute of
   * the Element's AttributeSet.
   */
  void _updateModelFromText() {
    JTextComponent textC = getTextComponent();
    Document doc = getDocument();
    if (textC != null && doc != null) {
      String text = textC.getText();
      SimpleAttributeSet sas = new SimpleAttributeSet();
      isSettingAttributes = true;
      try {
        sas.addAttribute(HTML.Attribute.COMMENT, text);
        ((StyledDocument) doc).setCharacterAttributes
            (getStartOffset(), getEndOffset() -
                getStartOffset(), sas, false);
      } finally {
        isSettingAttributes = false;
      }
    }
  }

  JTextComponent getTextComponent() {
    return (JTextComponent) getComponent();
  }

  String getRepresentedText() {
    AttributeSet as = getElement().getAttributes();
    if (as != null) {
      Object comment = as.getAttribute(HTML.Attribute.COMMENT);
      if (comment instanceof String) {
        return (String) comment;
      }
    }
    return "";
  }

  static final Border CBorder = new CommentBorder();
  static final int commentPadding = 3;
  static final int commentPaddingD = commentPadding * 3;

  static class CommentBorder extends LineBorder {

    CommentBorder() {
      super(Color.black, 1);
    }

    public void paintBorder(Component c, Graphics g, int x, int y,
        int width, int height) {
      super.paintBorder(c, g, x + commentPadding, y,
          width - commentPaddingD, height);
    }

    public Insets getBorderInsets(Component c, Insets insets) {
      Insets retI = super.getBorderInsets(c, insets);

      retI.left += commentPadding;
      retI.right += commentPadding;
      return retI;
    }

    public boolean isBorderOpaque() {
      return false;
    }
  } // End of class CommentView.CommentBorder
} // End of CommentView
